Set 20 of the World of Warcraft Trading Card Gamewas announced earlier today, entitled Betrayal of the Guardian. The set is themed around Medivh and Karazhan. Given that information, it seems very likely that the upcoming set of TCG loot has been included in this PTR patch. The Ghastly Charger is likely the rare mount of the set, while the Gusting Grimoire is likely to be the relatively common pet. As for the uncommon vanity item? There's a miniature Dark Portal amongst the datamined. Fitting, we think.